Railway-track jack.



PATENTBD JAN. 16, 1906.

J. STEWART.

RAILWAY TRACK JACK.

APPLICATION FILED AUG.15,1904. RENEWED DBO. 18,1905.

I I NW4 vilV i UNITED STATES JOHN STEWART, OF NEIV GLASGOW, CANADA.

RAILWAY-TRACK JACK.

Specification of Letters Patent Patented Jan. 16, 1906,

Application filed August 15, 1904. Renewed December 18, 1905. Serial No.292,158.

To (all whom it may concern.-

Be it known that I, JOHN STEWART, a citizen of Canada, residing at NewGlasgow, in the county of Pictou and Province of Nova Scotia,Canada,'have invented new and useful Improvements in Railway-TrackJacks, of which the following is a specification.

My invention relates to improvements in railway-track jacks whereby thesame are operated with the ordinary crowbar or liningbar used bytrackrnen at their work; and the objects of my improvements are, first,to dispense with the necessity of trackmencarrying a specialhandle foroperating track-jacks second, to dispense with the necessary gearrequired for said special handle, and, third, to have a light strongconvenient track-jack without unnecessary expense. I attain theseobjects by the mechanism illustrated in the accompanying drawings, inwhich Figure 1 is a perspective view of track-j ack as shown when inuse. Fig. 2 shows trackjack broken down through the center, showing theposition of the diflerent parts in their respective places; and Fig. 3represents details of the device.

. Similar letters refer to similar parts throughout the views,

Referring to Fig. 2, A is a hollow cast or malleable iron stand brokendown through the center, showing a hollow groove running verticallyalong its front side, in which is shown the hooked L-shaped lifting-barB, on which is a loose jam-nut O, with a projecting handle which restsin the back part of stand A and passes out through, as shown, and alsothe loosejam-nut D, with a projecting handle which rests in the lowerend of the link E, referred to hereinafter. On bar B is also afilling-ring H, which acts as a filler to keep the jam-nuts C and Dsufficiently apart to freely admit the end of link E between theirprojecting handles, and also in combination with jam-nuts C and D whenlowering the rail, as will be shown hereinafter. On the top of bar B isa screwed nut G, which prevents it from slipping out of place and alsoacts as a cap when load is lifted on top of bar.

Referring again to Fig. 2, E is a lifting-link which is supported in thepocket I, formed in the upper part of stand A. On the outer and upperedge of the pocket I is formed the solid fulcrum F and the removablewearlate F made of iron or steel and secured in e place by a screwbolt.The hook J on the back of stand A, directly above the projecting handleof jam-nut O, is used as a support for the end of the crowb ar whenlowering the rail. The link E as used in combination with the hookedlifting-bar B, jam-nuts O and D, and filling-ring H is described in thefollowing operation: To lift a rail or similar object, place the frontside of base-plate of stand A and the L-shaped hook of lifting-bar Bunderneath the rail or object to be lifted. Then place the end of anordinary crowbar over the fulcrum F and into the upper end of the link Eand bear down the handle end of crowbar. This will cause the link E torise and draw up the handle side of am-nut D, causing it to cant forwardand grip the lifting-bar B, which in turn rises with the rail or objectbeing lifted. At the same time bar B rises up through jam-nut O, whichcants forward, gripping bar B and holding it as a pawl until the crowbaris raised, allowing link E and upper am-nut D to slide down to theirformer positions for another lift. Repeat this operation, as with anordinary pump-handle, until the rail has attained the required height.To lower the rail, remove the crowbar from the link E and place the endof it underneath the hook J and over the projectinghandle of j am-nut C.Then press down the handle end of crowbar. This will cause jamnut O tocant and release its hold of bar B. At the same time the other end ofjam-nut O rises up against the filling-ring II, which rises and pressesagainst the forward side of jarn-nut D, which releases its hold ofliftingbar B, allowing it, with rail, to drop to its former position.

I am aware that prior to my invention track-j acks were in use havinghooked lifting-bar and jam-nuts. I therefore do not claim such acondition broadly.

What I do claim, and desire to secure by Letters Patent, is arailway-track jack comprising 1. The stand provided with the pocket Iadapted to inclose link E and formed with the fulcrum F properlyadjacent to said link.

2. The stand provided with the fulcrum F In testimony whereof I havesigned my and the removable Wear-plate F. name to this specification inthe presence of 3. The combination with the am-nuts of two subscribingWitnesses. the filling-ring and the link E interposed be- JOHN STEW ART.5 tween said nuts, and operating as set forth. Witnesses:

4:. The stand provided with the hook J in ROBERT M. MAoGRRGoR,

combination With the jam-nuts as set forth. GEO. W. FRASER.

